Some of the most famous voices in the world — Steven Tyler, Julie Andrews, Dick Vitale — have entrusted their pipes to Steven Zeitels, a relentlessly creative MGH surgeon whose latest breakthrough may make him a savior to countless cancer victims as well.

At the Judge Rotenberg Center, students who misbehave receive electric shocks powerful enough to sear their skin. What’s even more unbelievable is how the moms and dads of the kids there feel about the Canton school.